Navien NFC-175 Installation & Operation Manual page 91

Press the Back button ( ) to return to the previous screen or menu.
Item
Set the hot water temperature(°F).
1. DHW Set Temp Setting range: 86 - 140°F (30 - 60°C)
●
Default: 122°F (50°C)
●
When only one NFC boiler is connected:
Set the Recirculation type and Schedule
settings.
Recirculation type
●
- No Recirculation
- Combi Pre-Heat
- External
Note
Recirculation type settings (Combi Pre-
heat/External)
Set to Combi Pre-heat (Default: Always
●
2. DHW Recirculation
On)
- Always On
- Intelligent
- Weekly
Note
Set to External (Default: Always On)
●
- Always On
- Intelligent
- Weekly
- Aquastat
- Manual
When installing only one NFC boiler, refer to "3.6.4 System
Application - Air Handler System" and Chapters 3.6.6, 3.6.7 on
connecting system applications.
Description
External recirculation cannot
be used for cascade systems.
Intelligent mode cannot be
used for cascade systems.
Combi Pre-Heat
When using the combi pre-heat feature, you can choose
commands in the menu to preheat according to the set DHW
temperature.
Item
Set to repeat DHW Recirculation
1. Always On
(default).
Set to detect DHW usage for a week
2. Intelligent*
and repeat the detected cycle.
The user can choose commands for
DHW Recirculation on a weekly basis.
1. 1 Day: schedule a command for the
week.
3. Weekly*
2. 3 Day: schedule commands for
Weekdays, Saturdays, and Sundays.
3. 7 Day: schedule commands for each
day of the week.
* To choose this option you must set up the Time settings in the
Configuration menu.
If there is a SH Demand signal during combi pre-heat,
Note
the space heating will take priority.
Description
Operating the Boiler 91